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Aiming at the pain point of the manual meter reading which is cumbersome and time-consuming, this paper proposes a design scheme of the remote automatic meter reading system based on LoRa. Based on LoRa spread spectrum communication, the scheme adopts a combination of LoRa and Ethernet communication. An expanded star network is adopted in the network topology, and a TDMA mechanism is introduced to ensure the success rate of data transmission. This scheme introduces the system architecture, the network topology, the software and hardware platform of systems, self-defined LoRa MAC sublayer and workflow of each node. It realizes remote automatic meter reading management of water, electricity, gas and thermometers. Finally, the system is tested, and the test results show that the system has the advantages of wide coverage, high success rate of data transmission, fast networking and simple maintenance. It has a wide range of applications.